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Texas Instruments ADS8686SIPZA
- Part No.:
- ADS8686SIPZA
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 80-LQFP
- Datasheet:
-
ADS8686SIPZA.pdf
- Description:
- IC ANALOG TO DIGITAL CONVERTER
- Quantity:
- Payment:
- Shipping:
Inventory:3,863
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Product details
Overview
ADS8686SIPZA from Texas Instruments is a 16-channel, 16-bit, 1-MSPS dual simultaneous-sampling SAR ADC with integrated analog front-end, 1-MΩ input impedance, ±10 V/±5 V/±2.5 V programmable bipolar input ranges, and on-chip 2.5-V reference. It targets high-accuracy industrial data acquisition systems requiring synchronized multi-channel sampling.
For engineers reviewing the ADS8686SIPZA datasheet, ADS8686SIPZA pinout, ADS8686SIPZA application, or ADS8686SIPZA equivalent, key selection criteria include dual-group simultaneous sampling capability, hardware- or software-configurable input range and LPF, CRC error checking, self-diagnostic function, and operation across –40°C to +125°C.
Technical Context
The ADS8686SIPZA implements two independent 16-bit SAR ADC cores with dual simultaneous sampling-eight channels per group (A/B)-enabling time-aligned conversion of sensor pairs. Each channel features a programmable gain amplifier, 2nd-order low-pass filter (15/39/376 kHz options), and 20% overrange support.
It integrates dual LDOs (analog/digital), internal 2.5-V reference with buffer, and flexible digital interface supporting serial, parallel, and byte modes. Channel sequencing is handled by hardware or software, reducing host processor overhead while maintaining zero-latency conversions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 LSB = 152.6 µV at ±10-V full-scale, enabling sub-millivolt precision in industrial sensing. |
| Sampling Rate | 1 MSPS per ADC core - supports real-time capture of fast transients across all 16 channels with dual-group synchronization. |
| Input Impedance | 1 MΩ constant - eliminates need for external signal conditioning when interfacing directly with resistive sensors or current transformers. |
| Input Ranges | ±10 V / ±5 V / ±2.5 V (software/hardware selectable) with 20% overrange - accommodates sensor drift, fault conditions, and legacy signal levels without clipping. |
| LPF Bandwidth | 15 kHz / 39 kHz / 376 kHz - configurable anti-aliasing filtering per channel group to match signal bandwidth and noise requirements. |
| DC Accuracy | TUE ≤ ±3.5 LSB (±10 V w/overrange) - ensures calibrated measurement integrity across temperature without frequent recalibration. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, motor drive, and harsh industrial environments. |
Pinout & Package
The ADS8686SIPZA is housed in an 80-pin LQFP package (14.00 mm × 14.00 mm) with exposed thermal pad, optimized for industrial PCB layouts requiring robust thermal management and mixed-signal isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN_0A–AIN_7A, AIN_0B–AIN_7B | Differential analog inputs (16 total) | Two independent 8-channel groups for simultaneous sampling; each pair requires dedicated AGND return path. |
| AVDD, AGND (pins 5,16,29,72) | Analog power supply and ground | Must be decoupled locally with low-ESR capacitors; AGND planes must be separated from DGND except at single-point connection. |
| DVDD, DGND (pins 49,50) | Digital power supply and ground | DVDD supports 1.71 V to 5 V; DGND isolation prevents digital switching noise from modulating analog conversion accuracy. |
| CONVST, BUSY | Conversion control and status | CONVST initiates simultaneous sampling on both groups; BUSY indicates active conversion cycle-critical for timing-critical DAQ firmware. |
| SER/BYTE/PAR, DB[15:0], SCLK/RD, WR/BURST | Configurable digital interface | Supports three interface modes; pin-strapping at reset determines protocol-enables reuse across microcontroller families without hardware redesign. |
| REFIO, REFSEL, REFCAP, REFGND | Reference subsystem | REFSEL selects internal 2.5-V reference or external source; REFCAP requires 10-µF ceramic cap-ensures stable reference for <±0.7 LSB INL performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous sampling | Enables phase-coherent capture of motor current/voltage pairs or differential sensor outputs without inter-channel skew. |
| Programmable LPF per group | Three selectable cutoff frequencies allow dynamic trade-off between noise rejection and step response-no external RC networks required. |
| On-chip self-diagnostic function | Detects open-circuit inputs, reference faults, and ADC core errors during startup or runtime-reduces need for external BIST circuitry. |
| 8-kV ESD protection on analog inputs | Withstands field-level electrostatic discharge events without latch-up or parameter shift-improves system reliability in unshielded industrial enclosures. |
| CRC error checking (hardware-enabled) | Validates integrity of serial or parallel data transfers in noisy factory-floor environments-prevents silent corruption of critical sensor readings. |
Applications
| Multifunction Relays | Servo Drive Position Sensors |
|---|---|
Use Scenario: Real-time monitoring of line voltage, current, and frequency in medium-voltage protection relays. IC Role / Device Role / Timing Role: Simultaneous sampling of 8 voltage and 8 current channels enables precise phasor calculation and fault classification within one 1-µs window. Use Value: Dual-group synchronization eliminates time-skew-induced angle errors, improving relay trip accuracy to <0.1° at 50/60 Hz. | Use Scenario: Closed-loop position feedback in industrial servo drives using resolver or encoder analog outputs. IC Role / Device Role / Timing Role: Acquires resolver sine/cosine pairs and motor phase currents concurrently to compute rotor angle and torque vector in real time. Use Value: Zero-latency conversion and 1-MSPS throughput enable 20-kHz current loop bandwidth without interpolation delay. |
| Analog Input Modules | Data Acquisition (DAQ) |
Use Scenario: Modular I/O systems for PLCs and DCS controllers requiring hot-swappable analog input cards. IC Role / Device Role / Timing Role: Integrates front-end signal conditioning, filtering, and digitization into a single IC-replacing discrete op-amps, filters, and ADCs. Use Value: 1-MΩ input impedance and ±10-V range compatibility reduce external component count by >70%, lowering BOM cost and board area. | Use Scenario: High-channel-count portable or rack-mounted DAQ systems for test benches and predictive maintenance. IC Role / Device Role / Timing Role: Provides 16 synchronized channels with programmable oversampling and CRC-supporting both transient capture and steady-state logging. Use Value: Hardware channel sequencer offloads CPU scheduling; burst mode enables gapless streaming at full 1-MSPS aggregate rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-channel-count, simultaneous-sampling ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPZT | Same 16-channel, 16-bit, 1-MSPS architecture but in 100-pin TQFP; adds SPI-only interface and removes parallel/byte modes. | Better suited for space-constrained designs where serial interface suffices and higher pin count is acceptable for improved thermal dissipation. | Select ADS8688IPZT when SPI integration simplifies host interface and thermal margin is prioritized over pin count. |
| AD7606C-16BSTZ | 16-bit, 8-channel (not 16), 1-MSPS, simultaneous-sampling ADC; no integrated PGA or programmable LPF; uses external reference only. | Targeted at cost-sensitive, lower-channel-count applications where external signal conditioning is already present. | Choose AD7606C-16BSTZ only if channel count requirement is ≤8 and external analog front-end is available. |
Compared with ADS8688IPZT and AD7606C-16BSTZ, the ADS8686SIPZA uniquely combines 16 synchronized channels, on-chip PGA/LPF/reference, and triple-interface flexibility-making it optimal for new industrial DAQ platforms demanding integration, configurability, and thermal resilience.
Availability
ADS8686SIPZA is available at Aetrix Electronics and suitable for multifunction relays, servo drive position sensors, and analog input modules requiring stable component supply across extended temperature and long production lifecycles.
Supply support for ADS8686SIPZA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The ADS8686SIPZA belongs to TI's high-performance precision data acquisition product line, designed specifically for industrial automation systems needing synchronized multi-channel sampling, rugged analog front-ends, and extended temperature operation.
FAQ
What input voltage ranges does the ADS8686SIPZA support, and how are they configured?
The ADS8686SIPZA supports ±10 V, ±5 V, and ±2.5 V bipolar input ranges, with optional 20% overrange. Configuration is achieved via hardware pins (HW_RNGSEL[1:0]) or software registers-enabling seamless adaptation to diverse sensor outputs without PCB changes. The ADS8686SIPZA maintains 1-MΩ input impedance across all ranges, ensuring consistent loading behavior.
Does the ADS8686SIPZA require external components for reference or power regulation?
No-the ADS8686SIPZA integrates a precision 2.5-V reference with buffer, dual LDOs (ALDO/DLDO), and internal regulators for analog and digital supplies. Only external decoupling capacitors (10-µF ceramic on REFCAP/REGCAP/REGCAPD; 0.1-µF on DVDD) are required. This reduces bill-of-materials and layout complexity versus discrete reference solutions.
How does the dual simultaneous-sampling architecture of the ADS8686SIPZA benefit industrial applications?
The ADS8686SIPZA's dual-group (A/B) simultaneous sampling eliminates inter-channel timing skew-critical for accurate phasor calculations in protective relays or torque estimation in servo drives. With 16 channels sampled in lockstep at 1 MSPS, the ADS8686SIPZA delivers deterministic, zero-latency results essential for closed-loop control and fault detection.
Can the ADS8686SIPZA operate reliably at +125°C ambient temperature?
Yes-the ADS8686SIPZA is fully specified from –40°C to +125°C ambient, with DC and AC performance guaranteed across this range. Its thermal design (RθJA = 33.1°C/W) and on-chip diagnostics ensure stable operation in motor drives, under-hood automotive ECUs, and other thermally demanding environments where the ADS8686SIPZA maintains <±2 LSB INL and <91 dB SNR.
What digital interface options does the ADS8686SIPZA provide, and how are they selected?
The ADS8686SIPZA supports serial, parallel, and parallel-byte interfaces via pin-strapped SER/BYTE/PAR and DB9/BYTESEL. Interface mode is latched at full RESET-allowing hardware configuration without firmware intervention. This flexibility lets the ADS8686SIPZA interface seamlessly with FPGAs, ARM Cortex-M MCUs, or legacy DSPs without protocol translation layers.
ADS8686SIPZA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 80-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 16
- Input Type:
- Single Ended
- Data Interface:
- Parallel, Serial
- Configuration:
- PGA-ADC-MUX
- Ratio - S/H:ADC:
- 0:2
- Number of A/D Converters:
- 2
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 1.71V ~ 5.25V
- Features:
- PGA, Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 80-LQFP (14x14)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8686SIPZA FAQ
1.How can I place an order for ADS8686SIPZA through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8686SIPZA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADS8686SIPZA reliable?
The price and inventory of ADS8686SIPZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8686SIPZA is usually 5 days.
3.What payment methods are accepted for ADS8686SIPZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8686SIPZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8686SIPZA?
ADS8686SIPZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8686SIPZA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADS8686SIPZA?
For technical support, including ADS8686SIPZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8686SIPZA requirements.
6.How does Aetrix verify that ADS8686SIPZA is sourced from the original manufacturer or authorized distributors?
All ADS8686SIPZA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS8686SIPZA meets industry standards.
7.What is the process for return or replacement of ADS8686SIPZA?
All ADS8686SIPZA units undergo pre-shipment inspection (PSI). If there is an issue with ADS8686SIPZA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADS8686SIPZA part is unused and in its original packaging.
Return procedure for ADS8686SIPZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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